1. Back to back, Face to Face：97 Yangguang Canlan de Rizi;In The Heart of The Sun ?光 的日子 | 96 Back to back, Face to Face 背靠背, ? | 99 Comrades; almost A Love Story 甜蜜蜜
2. 背靠背的反义词
2. back-to-back type：back-to-back testing || 背靠背试验,反馈试验,对拖试验 | back-to-back type || 背靠背 | back-to-front ratio || 正反比